Specifications

User Manual 3155
3-50 ArbConnection
Equation
Conventions
The following paragraphs describe the conventions used to write an
equation. To avoid errors, make yourself familiar with these conven-
tions before writing equations.
Equations are written in conventional mathematical notation. You
may only enter the right part of the equation. The only limitation is
that the equation must be of a single variable directly related to the
current horizontal axis setting. Case is not important and spaces are
ignored. Numbers are entered in scientific notation. All calculations
are done with double precision. For trigonometric functions, all an-
gles are expressed in radians.
A number of constants are provided: e, which is the base of the natu-
ral logarithm; pi, which is the circumference of a unit-diameter circle;
per, which equals the programmed horizontal range; f, which equals
1 /per; omg, which equals 2 * pi / per, and numerals from -1E^20 <>
1E^20.
There are three classes of precedence: ^ (raise to power) has the
highest precedence; * (multiply) and / (divide) come second; + and -
have the lowest precedence. Parentheses may be used to change
the order of precedence. The following table summarizes the
mathematical expressions and their respective abbreviated com-
mands that can be used with the Equation Editor.
Equation Editor Operands
^ Raise to the power
* Multiply
/ Divide
+ Add
- Subtract
( ) Parentheses
e Base of natural Logarithm
pi (π) Circumference of unit-diameter circle
per Horizontal wavelength in points
f 1/per
omg (Ω) 2*π / per
amp Amplitude in units of points or seconds
sin(x) The sine of x
cos(x) The cosine of x
tan(x) The tangent of x
ctn(x) The cotangent of x
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